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Re: how to get the data from the contour line? [message #43626]

Tue, 19 April 2005 22:11

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Craig Markwardt writes:

> "lixiaoyao" <lixiaoyao5880@yahoo.com> writes:
>> so,can you tell me how to it in detail?
>
> Yes, you open the documentation, and search for the procedure CONTOUR.
> Then you look for the keywords starting with the phrase PATH.

What a fortuitous day to retire! :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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Re: how to get the data from the contour line? [message #43629 is a reply to message #43626]

Tue, 19 April 2005 20:51

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

"lixiaoyao" <lixiaoyao5880@yahoo.com> writes:
> so,can you tell me how to it in detail?

Yes, you open the documentation, and search for the procedure CONTOUR.
Then you look for the keywords starting with the phrase PATH.

CM

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Re: how to get the data from the contour line? [message #43630 is a reply to message #43629]

Tue, 19 April 2005 20:05

lixiaoyao
Messages: 49
Registered: April 2005

Member

so,can you tell me how to it in detail?
Thanks

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Re: how to get the data from the contour line? [message #43631 is a reply to message #43630]

Tue, 19 April 2005 18:58

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

"lixiaoyao" <lixiaoyao5880@yahoo.com> writes:

> hello all
> I have a file like this to draw the contour using IDL.my probelm is
> how to get the data for the contour level is equal to 1.2 case?
> who can help me for this question?

How about reading the documentation for CONTOUR and the keywords
beginning in PATH?

Craig

> set_plot,'ps',/copy
> device,filename='isothermal.ps'
> device,/landscape
> ;window,xs=640,ys=480
> x=2*findgen(101)/100+0.2
> y=2*findgen(101)/100+0.2
> xx=rebin(x,n_elements(x),n_elements(y))
> yy=rebin(transpose(y),n_elements(x),n_elements(y))
> ;shade_surf,(exp(2*alog(yy)+1/yy))/(exp(xx^2)-alog(xx)),xx,y y
> ;contour,(exp(2*alog(yy)+1/yy))/(exp(xx^2)-alog(xx)),yy,xx
> shade_surf,exp(xx^2/2-alog(xx))/(exp(2*alog(yy)+1/yy)),yy,xx ,xtitle= "Dimensionless
> Radius in log scale",ytitle="Mach number in log scale"
> contour,exp(xx^2/2-alog(xx))/(exp(2*alog(yy)+1/yy)),yy,xx,le vel=[0.4,0.6,0.892521,1.2,1.4],/xlog,/ylog,xtitle= "Dimensionless
> Radius",ytitle="Mach number",title="Isothermal case"
>

--
------------------------------------------------------------ --------------
Craig B. Markwardt, Ph.D. EMAIL: craigmnet@REMOVEcow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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